Crown block



i 1,563,739 E. W. GOESER CROWN BLOCK Dec.. i925.

6 Sheets-Sheet 2 Filed April v, 1924 KMMUN Dec; 1f', 1925.A 4 11,563,739 E. w. Gor-:SER

CROWN BLOCK l Filed April 7*," 1924 6 Sheets-Sheet Dec. 11925. l 1,563,739

.5. W! GOESER CROWN BLOCK Filed April. v, :i924 e sheets-shew 4 Zwar/Mays.

Dec. 1I 1925. I l 563,739 I' Y E. w. GOESER CROWN BLO C K Filedl April-7, 1924 6 Sheets-Sheet 6 Kwai/1225:

.m may. com

zfs elevation. thereof.

- 1S a Wndi l diagram showing how pam mm hwmrous apparatus.

diagram Showing' the plan. o @5 f' f e evaillm of the @apparatus ame und klmwn colctn'cy, caiied. pars. as the crown dock.

B15 wid@ a mmm bisch, the sheaves; 0f which -ejugjnm'/*d 'oheman hoistzlm im'cpendeutly adjustable, it is ugual, Y., Tw denial.: 5S pl'ovded with a in Fm Staudzld cmwn block, #in @rolde Sam. areal 3Q mi. iwan@ line, 31 which passes amica-1 sheuxws, rm@ which mme Wma' xgginfmy wel? th@ @and shame ll und mp0 from ith@ bu w'xevL 0110. 03 which dmvmv'ady fifi-f om' of th@ .emck. The

ly under asheave in the pulley block 54, up- Wardly over the sheave 2.4, downwardly under a sheave in the pulley block 54;; up-

' Wardly over the sheave 25; and downwardly j the lower sheaves Q1 to to the draw works 53.

in some cases where the tools or pipe to be lifted are not too heavy, one or more oi the sheaves 2l to 25 may he dispensed with, the arrangement shown being that ordinarily used for heavy rotary drilling. lt is-very desirable that all or the sheaves ou the crown block be adjustable Within limits to prevent side pull on the ropes and my invention makes particular )rovision for accomplish ing this object. T e sheaves 21 to 25 inclusive, which may be denominated the lower sheaves, are so mounted as to turn freely on I shafts which have lower flattened surfaces 6l. The sheaves 2l, 22 and 24; are each mounted alone on a shaft 60 while the sheaves 23 and 25 are mounted together on a shaft 60, asshown in Fig. l. These surfaces 6l rest directly upon the upper edge of one flange 62 ofy l'i-beanis G3, these IA beams forming a supporting` structure tor lilounted to slide freely on the top 62 of the li-beani GS are lower brackets these brackets hai/itu; semi-cylindrical saddle G6 res Iing; on the shafts .60. Passing through. holes in the brackets are clamp bolts 67 which extend down under the upper flange oit the tbeaiu 63 and enable the lower brackets 65 to be clamped in any position along the top of the r .l1-beams. This enables a proper adjustment to be made of the sheaves 21 to 25 and permits the maximum diameter oi sheave to be used in this position o which the dem-ick is capable.

Since the sheaves il and l2; which may hereinafter beternied upper sheaves, are not used for the saine purpose as the sheaves 2l to 25 but form. parts olf entirely diilierent hoisting systems, it is necessary that they be capable of adjustment independently of the sheaves 2 to This I accomplish by mounting theupper sheaves ll and 12 on shafts 'Z'O which have a flattened surface 72 resting; on the top of the brackets 65. The brackets 65 are made of suiicient length to allow the upper shafts '70 to be given a considerable movement thereon as, for example, :troni the position shown in full lines in Fig. 'T and the position shown in dotted lines in that figure. Brackets 71 are provided for engaging the tcp of the shafts 7th Bolts 75V,

are provided for pulling the brackets il douuiufardly thesebolte haring heads slid" ing in slots ,75 formed in the top .of the brackets 6o',- lt will be evident that with this construction the upper sheaves' ll' and l2 may be adjusted lon the tops o'l' the breek ets65 so that the upperfehee'res may be moved linto the proper positionuuite inde; pendent' of the lower sheaves, a

sito

recense lower brackets inde'j'iendcntly, and since both seis of brackets are independently adjustable with their axes in diiierent planes, it is possible to use much larger sheaves than in the former typeslot coustrmtion. These larger sheaves are very desirable as they greatly reduce the Wear ou the wire ropes, the

amount of this Wear beingr in inverse proportion to the size of the sheaves from which the ropes pass. v

y l claim as my invention:

i. ln au oil well derrick, the combination ot: a supportingi structure at the top ot the derricl; lower brackets mounted in pairs on said structure; lower shafts, each sup ported in one ot' said pairs of brackets; lower sheaves, euch sheave turning freely ou one of said lower shaifts; upper brackets4 mounted in pairs ou said lower brackets and url iustuble horizontally; upper shafts, each mounted in one ot said pairs of upper brackets and lippe sheaves` each turningl freely ou one or" said upper shafts.

2. In an oil Well derrick, the combination o't': a supporting structure at the top ot' the dori-ick; lower brackets mounted in pairs on uuid structure: lower shafts euch supported in one ot said pairs ot' brackets; lower sheaves. each sheuve turningr freely on one of said lower shafts; upper brackets inounted in pairs upon said lou-'cr brackets; upper shafts each mounted in one of said pairsof upper brackets; and upper sheaves, each turning freely on one ot said upper shafts.

3. In au oil' well f'lerricli, the combination of: a siuiportine; structure at the top of the dei-rick; lower brackets mounted in pai s on said structure and adjustable horizontally; lower shafts, euch supported in one of said pairs of brackets; lower sheaves, each shears, turning freely on one oi said lower shafts; upper brackets -inounted in pairs on said lower brackets and adjustable horizontally; upper shafts, each mounted in one oi said pairs of upper brackets; upper sheaves, each turning :freely on one of said upper shafts: a pulley block suspended below all of said sheaves and adapted to be attached to the load to be lifted.; a main Wire rope threaded through said louer sheaves and said pulley block; means for Winding up said main 'Wire rope; auxiliary Wire ropes passing over said upper sheaves; and means tor Winding up said ausili y wire ropes.

et. In en oil well derrick, the combination of: a supporting structure at the top of the derrick; lower brackets mounted in. pairs on said structure; long' sbatte each supported Lisesyse i i it in one of said pairs of brackets; low-er sheaves, each sheave turning freely on one of said lower shafts; upper brackets mounteil in pairs upon said lower brackets; upper shafts, each mountedy in one of saiol pairs of upper brackets: upper sheaves, each turning freely on one ot' said upper shafts; a pulley block suspended below all of said sheaves anil adapted to be attached to the load to be lifted; a lnain wire rope threaded through said lower sheaves and said pulley block; means for winding up said inain wire rope; auxiliary wire ropes passing over, said upper sheaves; and means' for winding: up Said auxiliary wire ropes.

5. In a crown block for use in oil well ilerricks, the combination of: a supporting structure at the top ol llie V(lerricl a lower bracket resting upon .saiil supportingr structure; means for securing said lower bracket ou said supporting structure; an upper bracket: and n'ieans for securing' .said upper bracket on saiil lower braekel.

(l. In a crown block l'or'nse in oil well ilerricks. the couibinaiton of: a supporting structure at the top ot the (lerriclu a lower bracket resting upon .saiil supporting' strncture; means for securing' saiil lower bracket on saiil supporting: structure: an upper. bracket resliiue upon saiil lower bracket: and

bracket on said lower bracket.

means for ailjustablv securing saiil upper Structure aiwtlie top ol', the (lerrirk: .a lower bracket resting' upon lsaul suppi-nilng' strucA [ing structure: a lower shaft bracket ture and having a latru'pper. face on the upper ,surface thereof.; means for securing said lower bracket on sai-l supporting struc lure: an upper bracket; :nml means for securing' saifl upper bracket on said lower bracket.

8. In a crown block for usel in oil Well (lei-ricks` the colnbinaion of: -a supporting structure al the lop of the derrick; a lower bracket resting: upon said supporting,struc` ture and having' a llat upper face ou the upper surface thereof: nieans for securing saidl lower bracket on said supportingr structure; an upper bracket' resting upon theat upper face ol" said lower bracket and horizontally adjustable: and means l'or securingr said 'upper bracket on said lower bracket..

l). In a crown block for use in oil well clerlicks, the combination of: a supporting structure al' the top ol the derrick; a lower bracket resting' upon aaifl supporting' strueture anil having a flat upper Ylace on the upper surface thereof: means for securing saiil lower bracket` onf'saiil supporting structure;

an upperfliracket'restine" upon the flat upper .'laee ol' sai l lower bracket anfl slitlable thereon; anil means` l'or securing saii'l upper bracket on said lower bracket.

l0. In a ilerrickcrown block: a supportadjustabl \Y iuouni'eil on said structure# and an upper shaft bracket adjustably mounted on A saisi lower shaft. bracket. 7. ln a crown block vl'ornse ilroil well ilerricks the coiulunal'iou ol': a sui'iporl-uug' In tesliinouv whereof` I have hereunto set iur band at Los Angeles', California7 this lTlli (lay ot' lllari'lav 1924.

'. TGITWIN lV. GGESER. 

